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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
The fourth pattern ... Bronchiectasis - Honeycombing ... low attenuation pattern ... Diagram #Comparison #Honeycombing
Honeycombing represents the second reticular pattern recognizable on HRCT.
Because of the cystic appearance, honeycombing is also
Honeycombing represents ... second reticular pattern ... cystic appearance, honeycombing ... low attenuation pattern ... Honeycombing is
The CXR demonstrates a reticular interstitial pattern with a preference at the lung bases.
The HRCT demonstrates
reticular interstitial pattern ... HRCT demonstrates honeycombing ... #Interstitial #Pattern ... #Honeycombing #
UIP
UIP is a histologic pattern of pulmonary fibrosis.
On a chest X-ray UIP manifests as a reticular
is a histologic pattern ... demonstrating honeycombing ... This pattern was ... HRCT demonstrated honeycombing ... #Honeycombing #
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
there are four patterns ... and what kind of pattern ... the most common pattern ... The cystic pattern ... histiocytosis or honeycombing
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
High Attenuation pattern ... bronchiectasis, no honeycombing ... HighAttenuation #Pattern
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Low Attenuation pattern ... Honeycombing 4. ... LowAttenuation #Cystic #Pattern
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Low Attenuation pattern ... Honeycombing. 4. ... LowAttenuation #Cystic #Pattern
High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
High-Res Chest CT Patterns ... Silicosis • Honeycombing ... Lymphangioleiomyomatosis • Honeycombing ... HighRes #Chest #CT #Patterns
Usual Interstitial Pneumonia (UIP) pattern on Chest CT
75 M with progressive dyspnea. Typical usual interstitial pneumonia
Pneumonia (UIP) pattern ... pneumonia (UIP) pattern ... Reticulation - Honeycombing